If anyone's interested, there are a couple of ClearSpeech base units up
for grabs on Ebay. Aside from a good speaker, these do more to
eliminate listener fatigue in sideband mode than anything else I've
come across.

http://cgi.ebay.com/AM-COM-ClearSpee...QQcmdZViewItem

http://cgi.ebay.com/ClearSpeech-Base...QQcmdZViewItem